<?php

function timeit(callable $func, array $args, int $times = 50000)
{
    if ($times < 1) {
        throw new InvalidArgumentException('times must be greater than 1');
    }
    
    $total = 0;
    
    for ($i = 0; $i < $times; $i++) {
        $initial = microtime(true);

        try {
            $func(...$args);
        } catch (Exception $e) {
            // nothing to do here.
        }
        
        $total += microtime(true) - $initial;
    }

    $per_call = $total/$times;
    echo "$times calls took $total seconds ($per_call seconds per call)\n";
}

$small = "helloworld123";
$big = "123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 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timeit('password_hash', [$small, PASSWORD_BCRYPT], 5);
timeit('password_hash', [$big, PASSWORD_BCRYPT], 5);